diff --git a/sentinel.go b/sentinel.go
index 7b53fd4..ec6221d 100644
--- a/sentinel.go
+++ b/sentinel.go
@@ -23,7 +23,13 @@ type FailoverOptions struct {
 	MasterName string
 	// A seed list of host:port addresses of sentinel nodes.
 	SentinelAddrs []string
-	// Sentinel password from "requirepass <password>" (if enabled) in Sentinel configuration
+
+	// If specified with SentinelPassword, enables ACL-based authentication (via
+	// AUTH <user> <pass>).
+	SentinelUsername string
+	// Sentinel password from "requirepass <password>" (if enabled) in Sentinel
+	// configuration, or, if SentinelUsername is also supplied, used for ACL-based
+	// authentication.
 	SentinelPassword string
 
 	// Allows routing read-only commands to the closest master or slave node.
@@ -109,6 +115,7 @@ func (opt *FailoverOptions) sentinelOptions(addr string) *Options {
 		OnConnect: opt.OnConnect,
 
 		DB:       0,
+		Username: opt.SentinelUsername,
 		Password: opt.SentinelPassword,
 
 		MaxRetries:      opt.MaxRetries,
diff --git a/sentinel_test.go b/sentinel_test.go
index 754f33d..3d9b281 100644
--- a/sentinel_test.go
+++ b/sentinel_test.go
@@ -212,3 +212,76 @@ var _ = Describe("NewFailoverClusterClient", func() {
 		Expect(err).NotTo(HaveOccurred())
 	})
 })
+
+var _ = Describe("SentinelAclAuth", func() {
+	const (
+		aclSentinelUsername = "sentinel-user"
+		aclSentinelPassword = "sentinel-pass"
+	)
+
+	var client *redis.Client
+	var sentinel *redis.SentinelClient
+	var sentinels = func() []*redisProcess {
+		return []*redisProcess{ sentinel1, sentinel2, sentinel3 }
+	}
+
+	BeforeEach(func() {
+		authCmd := redis.NewStatusCmd(ctx, "ACL", "SETUSER", aclSentinelUsername, "ON",
+			">" + aclSentinelPassword, "-@all", "+auth", "+client|getname", "+client|id", "+client|setname",
+			"+command", "+hello", "+ping", "+role", "+sentinel|get-master-addr-by-name", "+sentinel|master",
+			"+sentinel|myid", "+sentinel|replicas", "+sentinel|sentinels")
+
+		for _, process := range sentinels() {
+			err := process.Client.Process(ctx, authCmd)
+			Expect(err).NotTo(HaveOccurred())
+		}
+
+		client = redis.NewFailoverClient(&redis.FailoverOptions{
+			MasterName: sentinelName,
+			SentinelAddrs: sentinelAddrs,
+			MaxRetries: -1,
+			SentinelUsername: aclSentinelUsername,
+			SentinelPassword: aclSentinelPassword,
+		})
+
+		Expect(client.FlushDB(ctx).Err()).NotTo(HaveOccurred())
+
+		sentinel = redis.NewSentinelClient(&redis.Options{
+			Addr: sentinelAddrs[0],
+			MaxRetries: -1,
+			Username: aclSentinelUsername,
+			Password: aclSentinelPassword,
+		})
+
+		_, err := sentinel.GetMasterAddrByName(ctx, sentinelName).Result()
+		Expect(err).NotTo(HaveOccurred())
+
+		// Wait until sentinels are picked up by each other.
+		for _, process := range sentinels() {
+			Eventually(func() string {
+				return process.Info(ctx).Val()
+			}, "15s", "100ms").Should(ContainSubstring("sentinels=3"))
+		}
+	})
+
+	AfterEach(func() {
+		unauthCommand := redis.NewStatusCmd(ctx, "ACL", "DELUSER", aclSentinelUsername)
+
+		for _, process := range sentinels() {
+			err := process.Client.Process(ctx, unauthCommand)
+			Expect(err).NotTo(HaveOccurred())
+		}
+
+		_ = client.Close()
+		_ = sentinel.Close()
+	})
+
+	It("should still facilitate operations", func() {
+		err := client.Set(ctx, "wow", "acl-auth", 0).Err()
+		Expect(err).NotTo(HaveOccurred())
+
+		val, err := client.Get(ctx, "wow").Result()
+		Expect(err).NotTo(HaveOccurred())
+		Expect(val).To(Equal("acl-auth"))
+	})
+})
\ No newline at end of file